1959 torqueflight

I am curious about what you all know about the 1959 Torqueflight 3 speed. I know they make a variant of it today. Is it like the Mopar equivalent of the TH400? I’ve heard they are good Trang’s. How much hp/torque can they handle in stock form and is there any cheap must have updates? I am keeping the push button trans, but need some info.
Author: jayzee